GMC Answered Questions & Fixed Issues

A few common causes are low or dirty transmission fluid, or faulty shift solenoids. The transmission uses fluid pressure to shift the gears, and does so using electronic solenoids. If there is an issue with either of these the vehicle may experience problems shifting or transferring power to the wheels. If these are not the problem then it could be possible that the transmission is having internal faults, perhaps a worn torque converter, or transmission gears, inside of the transmission. As issues like these can sometimes be difficult to diagnose, if you are unsure, I would recommend having a professional technician look ay it.

good for you

open rear passenger door on drivers side and flip up seat mounted on floor under seat

Did they disconnect the battery for some reason? It sounds the the anti-theft immobilizer is triggered. Do you have a way to check for DTC codes? https://www.google.com/search?q=2005+GMC+Denali+security+reset ..

Question edited for clarity. Question moved to model category.

How do I reset the security system in a 2003 GMC Envoy?

JustAnswer https://www.justanswer.com > GM Repair Apr 10, 2010 - Turn the key on to the run position and leave it there for 10 minutes. After 10 minutes turn the key off without removing it and back on for 10 ... 1 answer · Top answer: Hello JACUSTOMER, in order to reset the system follow the instructions below. Let me know ...

GMC Envoy 1997-2008 Vehicle Theft Deterrent Relearn ...

Let's Fix That Car https://www.letsfixthatcar.com > gmc-envoy-1997-20... Aug 23, 2021 - 1. Turn ignition on. 2. Attempt to start the engine, and then release the key to the ON position. 3. Observe the security indicator ...

Check brakes pads/disc & check abs wirings

There are some ideas here. It appears to be a known issue. https://www.google.com/search?q=1992+GMC+Jimmy+with+Vortec+4.3+won%27t+stay+running& ..

you can check the transmission fluid if its ok and also the transmission pressure

If your 1998 GMC 4x4 pickup is stuck in 1st gear even after replacing the shift solenoids, it's recommended to have a professional mechanic inspect the Transmission Range Sensor, wiring/connectors, and the Transmission Control Module (TCM) for potential issues. These components can affect proper shifting, and a diagnostic scan can help identify the problem.

Pictures are fine on this website Here a a few Support Brackets. It sounds like it is to hold front end bodywork trim or an under engine splash cover. https://www.google.com/search?q=1988+GMC+Safari+support+bracket .. Picture of a picture below. click the Photos Icon, and click Upload. Navigate to where it is on your computer.

Wiring diagrams. https://www.google.com/search?q=2001+gmc+2500hd+headlights+wiring+diagram and https://www.google.com/search?q=2001+gmc+2500hd+headlights+wiring+pinout Plus https://www.alldata.com/diy-us/en ..

The back glass release relay on a 1993 GMC Yukon is located in the fuse box under the hood of the vehicle. The exact location of the relay is usually indicated on the inside of the fuse box lid.

To find the back glass release relay, first locate the fuse box under the hood of your 1993 GMC Yukon. Then, locate the relay diagram printed on the inside of the fuse box lid. Look for the relay labeled "back glass release" or something similar.

If you are having trouble locating the relay or if it has burnt out and needs to be replaced, it is recommended that you consult the vehicle owner's manual or take your vehicle to a qualified mechanic for assistance.

If the operation of your A/C and heat is causing your engine to surge in your 1991 GMC C1500 with a 5.7-liter 350 engine, there could be a few possible causes for this issue:

1. Engine Load: The A/C and heat systems place an additional load on the engine, especially when the compressor engages. This extra load can affect the engine's idle and cause surging. It's possible that the engine is not able to handle the increased load, leading to fluctuations in RPM.
2. Idle Control System: The idle control system, including the idle air control valve (IAC), may be malfunctioning or not compensating properly for the increased load when the A/C or heat is turned on. This can result in unstable idle and engine surging. The IAC valve may need cleaning or replacement.
3. Electrical Issues: Faulty electrical connections, such as loose or corroded wires or connectors, can cause intermittent power supply to the A/C and heat systems. In turn, this can lead to fluctuations in engine performance, including surging.
4. Vacuum Leaks: Check for any vacuum leaks in the A/C and heat system components, as well as the engine's intake manifold and vacuum lines. Vacuum leaks can disrupt the engine's air-to-fuel ratio, leading to unstable idle and surging.
5. A/C Compressor Issues: The A/C compressor itself may be malfunctioning, causing excessive drag on the engine. This can result in surging when the A/C is engaged. A faulty clutch, compressor bearing, or internal component may be the cause.
6. Engine Performance Issues: Other underlying engine performance problems, such as ignition system issues, fuel delivery problems, or worn-out engine components, can contribute to surging when the A/C or heat is in use.

To diagnose and resolve the issue, it is recommended to consult a qualified mechanic or an automotive technician who can perform a thorough inspection of your vehicle. They will be able to assess the specific conditions and components involved, perform necessary tests, and identify the root cause of the surging problem.

Have you replaced the actual switch panel mounted in the door? If everything else works directly with their own switches it could be the switches you use whilst driving.

The knocking is probably the blend door actuators. They have been detached or become stuck. They operate the doors that direct the flow of air. https://www.google.com/search?q=2004+gmc+envoy+blend+door+actuator+location ..

I'm sorry, but as a text-based AI model, I'm unable to provide visual images or diagrams. However, I can try to explain the general wiring setup for a 1976 GMC Jimmy. The wiring diagram for a specific vehicle can vary based on the model, trim level, and optional equipment. It's recommended to consult a service manual or reach out to a qualified automotive electrician for accurate and detailed wiring diagrams specific to your vehicle. In general, the wiring in a 1976 GMC Jimmy would consist of various circuits for different systems such as the ignition system, lighting system, charging system, and more. Here are some common components and circuits you might find:

1. Ignition System: This circuit includes components like the ignition switch, ignition coil, distributor, spark plugs, and related wiring. It controls the ignition timing and provides sparks to ignite the fuel-air mixture in the engine.
2. Lighting System: This circuit handles the headlights, taillights, brake lights, turn signals, and other exterior and interior lights. It usually consists of a combination of fuses, relays, switches, and wiring harnesses.
3. Charging System: The charging system includes the alternator, voltage regulator, battery, and associated wiring. It generates electrical power to charge the battery and provide electricity to the vehicle's electrical components.

no ENGINE TOLD AT ALL, SOME NEED HIGHER TORQUE TRANNY THIS CAR HAS RPO , LIST BASED ON VIN AND TELLS THE 3 DIGIT COLD FOR TRANNY , ALL GM DEALER CAN LOOK UP THAT CODE must fit and not make the TCM angry. ask chevy maker for the fits list or ask any transmission repair shops for the list. a transmission, has many options by class series number. even different RATIO'S AND LENGTH, MOUNTS AND TCM CONNECTIONS FUNCTIONS. EXAMPLES ,NOT SAYING IT IS YOURS, ONLY CAN BE. SERIES 4L60E (JUST A SERIES ok , UNDER STAND ?) M30 : TRANSMISSION, AUTO 4 SPD, HMD, 4L60E, ELECTRONIC NO ENGINE TOLD NO VIN TOLD SO I CAN GET THE RPO LIST ,BEST IS YOU TELL GM THE VIN AND YOU GET THE RPO. RPO, IS THE AS BUILT LIST. THEN SHOP. BY RPO(TRANS) CODE.

why r u running oil in your fuel ---scan for codes ---5.7 not a 2 stroke engine --oil probably fouled throttle body and spider---foul plugs

The video may help? https://www.google.com/search?q=1999+GMC+Sierra+Classic+3500+4x4+shift+down+while+driving+down+the+road ..

Yes it is all the same apart from the truck transmission gear ratios. The engines are the same size.